Exudative cysts of iris or anterior chamber, bilateral

This code signifies the presence of fluid-filled sacs (cysts) within the iris or anterior chamber of both eyes, which are characterized by the leakage or accumulation of exudate. These cysts are typically inflammatory in nature, often resulting from trauma, infection, or systemic conditions.

Use this code when documentation explicitly states bilateral exudative cysts of the iris or anterior chamber. This diagnosis is supported by ophthalmological examination findings, such as slit-lamp biomicroscopy, confirming the presence and exudative nature of the cysts in both eyes.

• Ensure documentation specifies "bilateral" involvement; otherwise, use the appropriate unilateral code (H21.311 or H21.312).
• Distinguish from non-exudative cysts (H21.4x) or atrophy of the iris (H21.2x) based on clinical findings.
• Code any underlying cause or associated systemic condition if known and documented, following sequencing guidelines.